Thank you Mike. Sadly attachments do not show up in messages with me. But I have seen plenty of pictures of hooped sails on Dutch traditional boats. The gap with the mast is most often not negligible. I assume that the loose lashings are shaped like a luff pocket sail. Rod's lashings showed to be very tight to the mast on the one picture. I was wondering if this setup would mimic a mast with a track to lee. If not and the lashings allow the sail to rotate freely I would expect the luff angle to be the bisector of the angle of an equivalent luff pocket which would be less to lee than optimal.
This would suggest theoretically the design of a non-rotating mast with a fore-aft symmetric biconcave foil with blunt edges and more concave to lee (to mimic a wing mast rotated for up wind) and with a track in the middle of the lee surface to fix the lee side of the imaginary luff pocket. Of course with all the complications of a bare pole wing mast.
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Posted by: lucjdekeyser@telenet.be
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